67643734044 has 24 divisors (see below), whose sum is σ = 159283413520. Its totient is φ = 22341049344.

The previous prime is 67643734033. The next prime is 67643734049. The reversal of 67643734044 is 44043734676.

It is a junction number, because it is equal to n+sod(n) for n = 67643733984 and 67643734002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67643734049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25856389 + ... + 25859004.

Almost surely, 2^67643734044 is an apocalyptic number.

It is an amenable number.

67643734044 is an abundant number, since it is smaller than the sum of its proper divisors (91639679476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67643734044 is a wasteful number, since it uses less digits than its factorization.

67643734044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51715509 (or 51715507 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 48.

The spelling of 67643734044 in words is "sixty-seven billion, six hundred forty-three million, seven hundred thirty-four thousand, forty-four".